The defendant shall set 33,00,000 won to the plaintiff and 12% per annum from April 4, 2020 to the date of full payment.

1. Comprehensively taking account of the respective descriptions of evidence A1 and 2 and the purport of the entire pleadings, the fact that the Plaintiff sold an oil vapor test device to the Defendant at KRW 33,000,000 on November 22, 2019, and the fact that the Defendant received the aforementioned test device by collecting it from its business place located in Gangseo-gu Busan Metropolitan City C.

Therefore, the defendant is obligated to pay to the plaintiff 3,00,000 won for the above experimental device purchase price and damages for delay at the rate of 12% per annum from the day after the payment order is served to the day of full payment.

As to this, the defendant did not dispute to the purport that the above testing device was defective, but there is no evidence to acknowledge it.

2. If so, the plaintiff's claim of this case is with merit, and it is so decided as per Disposition.